Neil -
just had a quick look into AWS Lambda, via ...
http://docs.aws.amazon.com/lambda/la...g/welcome.html
did your four hours or so include getting to grips with it for the first time, as a novice, or were you already into it ... ? ?
just trying to gauge how long we might need !
last experience of such things was with the Met.Office DataPoint facility - which took a while, especially the overlay side of things, 'though seemed all v.easy once did get into it ...
Chris